I did some searching on the forum this morning regarding power factor and have a design question.
We just recently a new high school and construction was completed last year. The school just had the electrical contractor that did the job monitor the power for a week. It turns out the power factor is around .74. (No swells, sags, etc.) They have several large chillers with induction motors so my guess is that these are the main contributors to the problem.
I know that you can specify the chillers to come with power factor correction. Would it be better to do that or provide correction for the whole building, right at the main service? If so, how would you best determine what size cap bank would you need for a whole building?
Thanks...
Tom Millard
We just recently a new high school and construction was completed last year. The school just had the electrical contractor that did the job monitor the power for a week. It turns out the power factor is around .74. (No swells, sags, etc.) They have several large chillers with induction motors so my guess is that these are the main contributors to the problem.
I know that you can specify the chillers to come with power factor correction. Would it be better to do that or provide correction for the whole building, right at the main service? If so, how would you best determine what size cap bank would you need for a whole building?
Thanks...
Tom Millard